Hood construction



May 3,1, 1927. 1,630,342

M. A. HUHNHOLZ HooncoNsTRUcTIoN Y FiledFeb. 2s, 1922 '2 sheets-sheet 1 lG.. l I

May 31 1927' M. A. HuHNHoLz HOOD CONSTRUCTION Filed Feb.' 25, 1922 2Sheets-*Sheet 2 Y. Patented May 192751, i'

narran stets MAX A; HUHNEoLaIoF CHICAGO; rnrrnvors.:V

y y:Hoon oonsrnuorron.'

Application ined rebraryas, i922".'.jsenainc;ssas'oe. fl.; 1

" l/Iy, invention relates y to motor:` vehicle construction, and moreparticularly tothe lhood surrounding thel motor and forming partpfl vWhile the `partie-fy the bodywof the vehicle. ular hood illustrated isintended for use on a motor vehicle, it will be apparent tromthe pfollowing description that many features of my invention are not limitedto use in connection with a hoodv employed solely on motor vehicles.

It is desired particularly, inmotor vehicle construction, to protect theexterior finish of l the hood from the heat ofthe motorgwhich heatcauses burningand ultimately darken-v ing of the finish, or lif the nishis of a darkl c olor, removing the lustre or brightness so that itdetracts from the general appearance of the vehicle. d y

VSo. far as' I am aware, lno steps have been taken to avoid thisdifficulty except for baktemperature, which was slightly greater thanthe heat developed by the motor. This method is satisfactory in that theoriginal.V color may be maintained under the heat ot' the motor, but thelustre is destroyed.l l Vshere the inish is of light color, air'dryingmust be resorted to, .and, consequently, not only is the lustre lostunder the heat of the motor, but the hood soon becomes darkened, causingtrouble and expense to the owner of ythe vehicle. f v

The object of the present invention is to provide means for overcoming Ythis diffculty, which means may consist in con'- structing the walls ofthe hood so that they are insulated against the conduction of heat. Bythe provision of this means, there is a tendency to maintain thetemperature under the'hood, by preventing the dissipation of the heatthrough the hood during the winter time while the car is left standing.V

In order to apprise those skilled in the art how to construct andpractice my invention, I shall now describe one embodiment thereofA inconnection with the accompanying drawing; in which,

Fig. l is a longitudinal verticalsection through the front portion of amotor vehicle;

Fig. 2 is a transverse vertical section taken on line 2 2 of Fig. l;

Fig. 3 is a view similar to Fig. 2, illustrating the use of a doublewall belovtT vthe motor;

and dash board, illustrating the vmanner of mg a ldark finish under arelatively high .contratan the' Simaesgfolf iiiabpenaigs in l the `sidesof v the hood and shutter controlling mechanism;

V:zontally through lone of the shutters;'l 1

Fisstruction; and

between the wallsloitl thev hood.

.is an alternative 'form of hood'coni Fig. 8 is aviewA .disclosingtheuse of vacuum Fig. i'sagdetail sectionalview of the hoo i Y Fig. '6 visyafdetail'sectional lview taken liorij" In the embodiment oimyinventionse?y 'i lected for illustration, the j'vehicle is provided the driverscompartment. 2. Closing over 2 and appearance asv heretofore. The -jheatinwith the usual'motor l 'disposed in front of *Y 7o'Y l sulating meansisdisposed on the-interior" f 'of the hood, although it may bemountedVon the outside, ify so desiredl rThelmeans provided for preventing theconduction of heat through thehood 34s, in

the present case, in Aform ofan'inner wall4 spaced away from vthe outervwall 5, 'The' inner wall 4 may be conveniently ytorn'ied by` i stampingit vout oi thin sheet metal vto the configuration of tilie'fouter wall45,'"but being` disposed on the inner side ofthis wal-l, it.

preferably is made slightly smaller;l i

rIhe wall 4 is then fastened in place in any suitable manner, las for`instance, by welding,

riveting, or bolting. As is well known, the

dead air space will `serve to prevent the* heat of themotor from passingfrom the wall 4 to the wall'ffV The hood sections areheld closed by thespring clips A8 mounted `:on the members 9 carrying'the usual siderunning boards. l v i Y As shown in Fig. 4, the-'hood Sis pro- Vvided atits sides with ventilator openings .f

10.. Means for'cont'rolling the` ventilation thus provided comprises"pivotally mounted shutters 12 disposed on theinterior of the f hood andcontrolled preferably -t'rom the dash board ot the vehicle. As shown inFigs. 5 andV G, the shutters 12 are also of double wall construction,andhave been arranged to seat within the walls of the hood so as toconstitute in reality a continuation thereof. The conduction 4of heatisfas efectively prevented at these points as' at' 12. The rodsg13 arecarried'by projecting studs 14 and-terminate at their inner ends in anysuitable way'to form flexible, cou plings with Vthe dash boardconnectionsV 15,v

these cou lines allowinp'.diseno'aoement be- Y n i a b tween the rods 18and lconnections 15 when the sides ofv the hoods are raised.Translational motion is imparted to the rods 13 by moving theconnections 15 intoandout kof :the dash board. VCollars .'16 areprovided onthe rods 13 'so' that vwhen the lattervavrev shifted, theVlinks 17 will be'swung' about the hinged point of thesHutters '12. vThus`the shutters 12 may be' easily operated to l their walls, but' this, ofcourse, is highly close the' openingsV l10, or to vary the'amount ofairJcirculatingthere through. It is apparent that the matter ofcontrolling the ventilation forl the interior ofthe hood by meansmountedv 'at "the "sides" th'ereef,Y may .be

widely varied. Itr is'not" necessary thatthe` shutters have a?- dead"air space between desirable.' e i Y Y i Fi'gl 3, itwill'jbeseen that Ihaveprovidedla double wall 'pan or apron member 18 adapted to beinserted under the motor 1` inv such a mannerthat 'substantiallyV theentire mot'o'i1 is enclosed by` thisdouble Vwall construction, with theexception of' the front andrear'end's where the'radiator and footboard'are located. The'member 18' is formed with longitudinal iianges 19,which are supported on the lo'w'er horizontal legs of the chan'nell iron2O of thechassis. This arrangement permits the'member 18 to beJ l easilyremoved-'when access to the underside of themotor is desirable.y

yIn Figi?, I have illustrated an alternative embodiment of' myinvention, employing in'lieu' of a dead air space between the walls 4Land, a layerl of asbestos'v 21, or other suitable heat insi'ilating`material.

vIn Fig. l8, I have.illustratedV a construc-v tion employing a partialvacuum between the walls eand ofthe hood. A vacuumis highly effective toprevent transfer of heat but ity is very difficult to maintain. Anyconstruction suitable to carry this vacuum may be employed. Y

It will be apparent from the foregoing ydescription that the gist of theinvention is the provision of a hood or other` surround-Y ing walls'having'means for preventing the` conduction of heat therethrough,andwhile I have illustrated a double wally arrange-V ment to accomplishthis purpose,it is'ap-- v parent that there are various ways to pro. f

Icure the, ,same results inner wall prevents the heatjfrom reaching theexterior` finish y.ofthe hood. The usel 'of'twow'alls isad'va'ntageousfrom a constructional standpoint, because of thefact However, I haveVfound. that spacing the outer wall from the that 'i they arel leasilyass'eiiibled, 'inexpensive l toy provide, andv produce a simple, lightand empaet hood; l

VI lclaim:` p n (1.71121, an, automobile hood'v construction,- thecombinationof an vinnerai'id' an" outerl wall united to prevent theVconduction2V of heat to` the exterior surface" of the hood whereby thel'inish thereon finay be. preserved from` the burning action of theh'e'atfof4 the f lmotor,` and pivotal'ly mounted shutters also providedwith an inner'.v and fanouter wallj to prevent the conduction fof .heatto'thej exterior thereof for lpreserving they finish. thereon, thepivotalmountingof .said shut"` ters permitting 'the shuttersto move intoand out ofs'aid double'wall hood ywhereby the inner and the outer wallsofthe shutters, When closed, are coplanar with the inner and the outerwalls of said hood.

2. `In an' lautomobile hood' construction,

the'k combination "of an inner and outerywall lunited to prevent thelconduction of heat to the exterior surface of the hood whereby Vthefinishfthereon may be preserved from the lbiirning 'action of the heatof ythe. motor, and@v pivotally' mountedI shutters also" provided withan inner and an outer wall to.

1 Max AQ HUHNHOLZ.

